Apark-arrester.



R. E. MITZEL. SPARK ARRESTER.

2 SHEETS-SHE 1.

gnaw mica:

'8. E. MITZEL.

SPARK ARRESTER.

APPLICATION FILED OCT. 16. 19:1.

2 sums-sum 2.

Patented Apr. 23, 1918;

RUBY E. MITZEL, 01? LARAMIE, WYOMING.

SPARK-ARRESTER.

Specification bf Letters Patent.

Patented Apr. es, mi.

Application filed October 16, 191?. Serial No. 196,933.

To all whom it may concern:

Be it known that T, RUBY E. MITZEL, a citizen of the United States, residing at Laramie, in the county of Albany, State of Wyoming, have invented certain new and useful Improvements in Spark-Arresters; and I do hereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to spark arresters.

The object of the invention is to provide an improved form of spark arrester for locomotives, which will effectively prevent the emission of ignited cinders and burning embersfrom the smoke stack to cause forest fires, prairie fires or other destructive burnmgs.

It is a further object of the invention to construct a spark arrester so that it will permit the maintenance of a proper draft to the locomotive fire box and smoke box.

With the above objects in view, and such others relating to the details of construc tion, as may hereinafter appear, my invention will now be fully set forth and described, reference being had to the accompanying drawings.

In the drawings Figure 1 is an elevation of the arrester mounted within a smoke box,

Fig. 2 is a vertical section on the line 2-2 of Fig. 3,

Fig. 3 is a section on line 3 -3 of Fig. 2,

Fig. 4 is a section on line 44 of Fig. 2,

Fig. 5 is a section on line 55 of Fig. 2.

Referring more particularly to the drawings, 1 represents the forward flue sheet of usual construction into which the lines 2 are connected. The smoke box 3 which lies in front of the flue sheet 1 has rising therein the exhaust nozzle 4, said exhaust nozzle 4; having its upper end projected through the dead plate 5 in the usual manner.

The dead plate 5 extends horizontally forward from an upwardly and rearwardly inclined battle plate 6 whose upper end extends rearwardly in, or is secured to a horizontal section 7 the rear edge of the latter abutting the flue sheet 1. Mounted below the forward edge of the dead plate 5 is a baffle plate 8 to which is secured an adjustable sheet 9 by pin and slot connections so that the sheet 9 may be extended downwardly and forwardly in continuation of the incline of'the plate 8, to provide a proper regulation of the circulation of the products of combustion.

Mounted upon the dead plate 5 is the spark arrester structure consisting essentially of a lower section 10 and an upper section 11 which taper in opposite directions from the flanged joint 12 by means of which the sections are bound together. The sections 10 and 11 are constructed from sheet metal of suitable weight, and the several sheet metal plates are outwardly flanged and bolted or riveted together or are connected together by angle-iron bars riveted according to the method which is found to be most suitable. The lower section 10, in the embodiment shown, consists of four generally quadrangular plates joined along their vertical edges and at their lower ends being suspended between and spaced from quadrangularly arranged sets of outer plates 13 and inner plates 14, the plate 10 being equi-distantly spaced between the plates 13 and 14 upon stay bolts 15. The plates 13 arecomparatively long low elements having their lower edges outwardly flanged to rest upon the dead plate 5, and having their ends outwardly flanged to be joined one to the other around the structure 10. The side plates, aside from being spaced from the plates 13 and 14, also have their lower ends spaced or riveted above the dead plate 5,

so that products of combustion passing downwardly between the plates 13 and 10, may then turn upwardly and enter the spark arrester through the spaces between the plates 10 and 141. Projecting inwardly from the walls of the section 10, near the upper end of the latter, is a plurality of rows of horizontally extending pins or spurs 16, the pins of one row being staggered with respect to the pins of another row, so that each one serves to interrupt the passage upwardly of the sparks and cinders which are drawn along with the products of combustion.

The upper section 11 is formed of a set of quadrangular plates similar to those forming the sides of the section 10, and at their upper ends have secured thereto in inwardly spaced relation a flue structure 17, the latter being supported by means of a plurality of rows of stay bolts 18 which extend completely around the structure 11, these bolts being also arranged in vertical staggered relation. The space between the flue 17 and the Walls of the structure 11 provides pas-' ders and embers which are being carried along by the products of combustion. The

upper end of the flue 17 is preferably projected slightly above the side plates of the section 11', and supports thereon the lower smoke stack section 19.

The products ofcombustion which are released into the smoke box 3 are drawn by the exhaust blast from the nozzle 4 through the passages formed by the plates 10, 13 and 1 1 and the plates 11, together with the flue 17 into the spark arrester structure, and by an efi'ective regulation of the draft.

reason of the tortuous paths through which they must pass, and because of the pins 16 and stay bolts 15 and 18 around which they flow, the burning cinders and embers are induced to fall before passing out of the smoke tunnel- 'The structure, aside from causing the cleansing of the products of combustion of cinders and sparks, provides The downward direction which is given to the several divisions into which the products of combustion are divided is particularly effective in removing the cinders from the products. I

What Iclaim as my invention is 1. A spark arrester, comprisingin combination with the smoke box and smoke stack of a locomotive, a dead plate extending horizontallyacross the smoke box and adapted to have the exhaust nozzle extended therethrough, a spark arrester structure mounted upon the dead plate and consisting of upper and lower oppositely tapered sections, inner and outer plates supporting the lower section above the dead plate and also 7 in spaced relation to the latter, and to said supporting plates, a flue structure mounted within the upper section at the upper end thereof and also in spaced relation to the walls of said upper section, and a stack section connecting the flue structure to the smoke stack. 7

2. A spark arrester, comprising in combination with the smoke box and smoke stack of a locomotive, a dead plate extending horizontally across the smoke box and adapted to have the exhaust nozzle extended therethrough, a spark arrester structure mounted upon the dead plate and consisting of upper and lower oppositely tapered sections, inner and outer plates supporting the lower section above the dead plate and also in spaced relation to the latter, a flue structure mounted within the upper section at the upper end thereof and also in spaced relation to the section, a stack section connecting the flue structure to the smoke stack, and a plurality of series of pins projecting across the passages between said inner and outer plates and the lower section and inwardly from the walls of the sections .to interrupt the passage of the products of combustion through the arresterstructure.

In testimony whereof, I afiix my signaturein the presence of two witnesses:

RUBY E. MITZEL.

Witnesses:

JOSEPH W. KLINE, WILLIAM MART,

copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

